def number_off():
    """

    :return:
    """
    for i in range(-20, 21):
        for j in range(-20, 21):

            a1 = i
            a2 = j
            num = []
            num.append(a1)
            num.append(a2)

            a3 = 1 * 2 - a1
            a4 = 2 * 2 - a2

            for k in range(1, 11):
                n = k * 2 - num[-2]
                num.append(n)
            if num[0] == num[-2] and num[1] == num[-1]:
                print(num)


if __name__ == '__main__':
    #  1 , 2 , 3
    number_off()
